The cold or catarrh, so common in autumn and winter because of the sudden temperature variations that favor the spread of viruses, is not a condition that can be prevented by taking certain vitamin supplements, as experts say.
A new study from the University of Otago (New Zealand), in which 322 healthy adults have participated, has shown that taking vitamin D supplements does not imply a significant reduction in the risk of suffering from a cold, nor does it reduce or reduce the duration of the symptoms of the cold.
Eating vitamin D supplements does not significantly reduce the risk of a cold or the duration of cold symptoms
In the trial - published in the Journal of the American Medical Association - data were taken into account such as the number of respiratory infections that occurred among the volunteers, how long the symptoms lasted in each of the episodes, and the days of sick leave that had to be requested by those affected by the cold. The participants were divided into two groups, one of which took a vitamin D supplement, while the other group was given placebo, over a period of three months.
The difference was minimal between the two groups, since in the case of those who took vitamin D a total of 593 people had a cold, in the placebo group they became ill 611. Regarding the average duration of symptoms, it was similar, 12 days in each of the groups, and also coincided in the lack of attendance at work, which consisted of a day on average.
In view of the results, the authors of the study consider that there are no statistically or epidemiologically significant differences in relation to the intake of vitamin D supplements as prevention of the cold or relief of their symptoms, which confirms the results of other similar studies about.
Dr. José María Molero, member of the group of infectious diseases of the Spanish Society of Family and Community Medicine (SemFYC), explains that vitamin D supplements can benefit people who have a deficit of this vitamin and suffer from pathologies such as COPD or asthma, but until now it has not been scientifically proven that both these supplements and those that provide vitamin C or E contribute to preventing the onset of colds or to relieve symptoms in healthy adults.